Hi,
Great result, congratulations are in order. Some TomToms have
cellular phones on board, can the user get internet on it from his
dialup Internet Service Provider? That would be extremely cool.
Thank you, kind regards, Matthijs.
At 12:00 PM 1/3/2009, you wrote:
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Today's Topics:
1. Debian on TomTom GO 720 (Emard)
2. Re: Debian on TomTom GO 720 (Wander Winkelhorst)
From: Emard <[email protected]>
Precedence: list
MIME-Version: 1.0
To: [email protected]
Date: Fri, 2 Jan 2009 18:21:33 +0100
Message-ID: <20090102172133.ga7...@z60m>
Content-Type: text/plain; charset=us-ascii
Subject: [OpenTom] Debian on TomTom GO 720
Message: 1
HI
I just succeeded in installing ARM-Debian on 2GB SD card on TomTom GO 720
>From that, any package in debian is availabe and will work, including
web browsers, X11, compilers editors anything
The trickiest part is you need to modify kernel config to include
reiserfs filesystem, swap support and FPU emulation
Reiserfs (or some other unix-grade efficient fs) is needed because
Debian needs symlinks priviledges that vfat doesn't provide
FPU is needed because many debian's binaries are not compiled as soft-float
in the library but expect FPU, either hardware or emulated by kernel.
Swap is needed because 64MB can be short sometimes, I gave it 128MB swap
recompile new kernel using original source and the cross compiler
extract original ttsystem, replace it's kernel with the compiled one
and installation of Debian can proceeed...
All the tools are on opentom website and the kernel
source can be downloaded from tomtom directly.
Currently original ttn application is needed to setup bluetooth and
networking but probably someone of you will find a way to setup this
from Debian and call ttn as an application from ...
Anyway, here are my step-by-step notes that got me up to the point
that I can ssh to Debian inside a TomTom:
0. on tomtom, prepare opentom bluetooth console tools and
setup on PC bluetooth networking server (dund), chack that you can login
to tomtom and that utilites like editor and screen work.
Also check that bluetooth console is working (serial login to tomtom
over rfcomm)
1. compile new tomtom kernel with added reiserfs, swap and FPU kernel support,
(compile them not as modules but in the kernel [*])
use original kernel sources and original cross-compiler tools
2. from opentom website get the tools to extract original ttsystem file
replece kernel with newly compiled arch/arm/boot/zImage and repack
extracted cpio.z archive with the new kernel into new ttsystem file
copy it in tomtom (rename old ttsystem)
3. with cfdisk create linux partition on tomtom's SD card (I used 2GB,
one partition on the whole card).
4. create reiserfs on the sdcard with mkfs.reiserfs
Optionally now you can try immediately point 6.
and verify that everything works
5. make first stage debootstrap on the PC /tmp and copy it to the sdcard
debootstrap --verbose --foreign --arch arm lenny /tmp/sdcard
http://ftp.us.debian.org/debian
The foreign option halts the debootstrap process before the chroot
(foreign means it's building for another host system).
6. login to tomtom, start screen. mount the sdcard reiserfs to /mnt/movinand
(if it had vfat, sdcard would be mounted automatically to /mnd/movinand)
mount -o noatime /dev/mmcblk0p1 /mnt/movinand
if you come so far, the rest is easy
7. from tomtom's shell (busybox) mount proc and devpts filesystems
(you can do it even though they are already mounted)
mount -t proc none /mnt/movinand/proc
mount -t devpts none /mnt/movinand/dev/pts
during installation phase check that they are still mounted,
if not mount them again. Typically rm -rf fails if there's no
/proc mounted and some packages won't install without /dev/pts
8. edit script debootstrap/functions and replace line:
in_target mount -t proc proc /proc
with this:
in_target_nofail mount -t proc proc /proc
because mounting /proc command will fail, but we have mounted it
already by other
means
9. finish debian's second stage (this takes time, maybe half an hour)
keep tomtom awake by pinging it each 15 seconds
ping -i 15 192.168.72.1 and
tapping on the next screen every now and then
(otherwise it would enter suspend state and loose network connection)
add some path probably that's missing
export PATH=$PATH:/usr/sbin
chroot /mnt/movinand
you should get shell prompt now like
sh-3.2# /debootstrap/debootstrap --second-stage
If debootstrap succeeds, the last line it prints will be:
I: Base system installed successfully
congratulations
10. follow instructions http://emqbit.com/deboostrap-debian
on how to setup system (hostname, passwords, etc)
Best regards,
Davor Emard
Content-Transfer-Encoding: 7bit
From: "Wander Winkelhorst" <[email protected]>
Precedence: list
MIME-Version: 1.0
Cc: [email protected]
To: Emard <[email protected]>
References: <20090102172133.ga7...@z60m>
In-Reply-To: <20090102172133.ga7...@z60m>
Date: Fri, 2 Jan 2009 20:50:44 +0100
Message-ID: <[email protected]>
Content-Type: text/plain; charset=ISO-8859-1
Subject: Re: [OpenTom] Debian on TomTom GO 720
Message: 2
On Fri, Jan 2, 2009 at 6:21 PM, Emard <[email protected]> wrote:
> HI
>
> I just succeeded in installing ARM-Debian on 2GB SD card on TomTom GO 720
Very nice!
Would you mind posting these instructions on the Wiki for future reference?
A minimal ready-to-boot image would be fantastic ofcourse :)
(allthough I have no clue if you can post multi-megabyte files on the
wiki)
Good job!
Wander.
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